/Engine/Source/Editor/DataLayerEditor/Public/DataLayer/DataLayerEditorSubsystem.h
Selects/de-selects actors belonging to the DataLayers.
true if at least one actor was selected/deselected.
bool SelectActorsInDataLayers ( const [TArray](API\Runtime\Core\Containers\TArray)< [UDataLayerInstance](API\Runtime\Engine\WorldPartition\DataLayer\UDataLayerInstance) * > & DataLayers, const bool bSelect, const bool bNotify, const bool bSelectEvenIfHidden )